1:13:11
Attempting to recover gold contained in gold corner BGA bottoms
1:36:27
Depopulating Boards for Gold Recovery
46:04
Easy Gold From E-Waste: Jani's Gold Plated Pins #gold #chemistry #refining #ewaste #scrap
33:09
Lavagem para obter ouro a partir de restos de chips de CI incinerados e triturados
52:35